Syringe construction



Dec. 15, 1942. A, E. sMlTH SYR'INGE CONSTRUCTION Filed May 5, 1939Patented Dec. 15, 1942 UNITED STATES PATENT OFFICE 2,305,278 sYmNGECONSTRUCTION Arthur E. smith, Los Ange-les, Calif.

Application May 5, 1939, Serial No. 271,887 1 claim. Y(c1. 12s-272)'I'his invention relates to syringes.

The general object of the invention is to provide a novel ampule syringewhich is particularly adapted to provide fresh solution for injection.

A more specific object of the invention is to provide a novel syringebarrel.

A further object of the invention is to provide a novel plungerconstruction for an ampule syringe.

Another object of the invention is to provide a novel ampule for asyringe.

A further object of the invention is to provide a novel stopper for usein a syringe ampule.

Other objects and the advantages of this invention will be apparent fromthe following description taken in connection with the accompanyingdrawing, wherein:

Fig. 1 is a central sectional View showing a syringe embodying thefeatures of my invention;

Fig. 2 is an end view of the rear member of the syringe;

1 Fig. 3 is an enlarged fragmentary central sectional view showing theampule;

Fig. 4 is a view similar to Fig. 3 showing the parts in anotherposition;

Fig. 5 is a view similar to Fig. 4 on a reduced scale showing the partsin another position;

Fig. 6 is a fragmentary sectional view on a reduced scale showing amodification; and

Fig. 7 is an enlarged fragmentary sectional View showing a furthermodification.

Referring to the drawing by reference characters I have shown myinvention as embodied in a syringe which is indicated generally at I0.

As shown the syringe includes a barrel I I having a rear member I2thereon and having a front member I3. The front member I3 is providedwith an aperture which receives a needle I4 the inner end I5 of whichprojects into the barrel.

'I'he rear member includes a telescopic section I6 having a head |1thereon which is normally urged in one direction by a spring I8 whichsurrounds a plunger rod I9. The plunger rod I9 has a ange 2U thereon.The head I1 is provided with a needle or piercing member 2| which lisarranged at one side of the axis of the head and plunger and whichslides in a groove 22 in the plunger. The flange includes a dependingcollar 23 and this collar as well as the flange 2D are notched toreceive the needle 2|.

Within the syringe barrel I provide an ampule 24 which may be made ofglass and which includes a front resilient cork 25 having an innerchamber 26 and an outer chamber 21 with a diaphragm 28 separating thechambers and adapted to be punctured by the end I5 of the needle toallow the contents of the ampule to be discharged from the syringe.

At its rear end the ampule includes a cork 29 having a recess 3|)therein with the diaphragm 3| closing the lower end of the recess. Thecork 29 is preferably spaced near the rear end of the ampule and belowthe diaphragm 3| I show another cork or disk 33 which is so spaced thatit provides a chamber 34 for a medicinal preparation 35.

All the corks are preferably made of rubber or a similar material sothat they form a hermetic closure.

In use the ampule is placed in the syringe after which the rear memberI2 may be turned so that the threads thereon engage the threads on thebarrel to hold the rear member in place.

The head I1 on the rear member thus engages the end of the ampule whilethe needle point I5 passes through the diaphragm 28 into the ampule. Asthe head I1 moves forward the needle 2| thereon engages the cork 33 atone side of its center as shown in Fig. 4 and tilts this cork allowingthe liquid contents in the main part of the ampule to communicate withthe area between the corks 29 and33 so thatthe ingredients may mix toform a fresh solution.

After the ingredients are mixed, pressure on the plunger causes theflange 20 thereon to move the corks 29 and 33 downwardly leaving theneedle-2| and allowing the hole produced by the needle to be closed. Inthis way the contents of the ampulevare ejected.

The recess and the cork 29 allow the needle 2| to enter at any locationabout the periphery of this recess.

In Fig. 6 I show a modification wherein a cork 29 which is similar tothe cork 29 is used in conjunction with a cork 33' similar to the cork33. A medicinal compound 35 is disposed between the corks. The cork 29differs from the cork 29 in that the former includes a central portionwhich is integral with the body of the cork. The use of the ampule shownin Fig. 6 is similar to that previously described. v

In Fig. 7 I show a further modification of the invention wherein thefront member 5| of the syringe includes a tapered recess 52 to receivethe tapered front end 53 of an ampule 54. A gasket 55 serves to maintainthe parts in sealing relation. At its upper end the ampule 54 includes acork 56 having a recess 51 and 5B at the opposite ends, the recess 51being separated by a diaphragm 59. A second cork or disk 60 closes thelower end of the recess`58. A medicinal preparation Bl is contained inthe chamber afforded by the recess 58.

In use the ampule 54 is inserted in the syringe aspreviously describedand the syringe rear member which is similar in all respects to the rearmember I2 is employed. The needle on this rear member pierces thediaphragm 59 and engages `the disk 60 at one side of its center tounseat the disk and allow the preparation El to pass into the vehicle.

From the foregoing description it will be apparent that I have inventeda novel syringe and ampule which are highly efiicient for the intendedpurpose.

Having thus described my invention, I claim:

In an ampule, a body cylindrical throughout and having a cork therein atone end thereof, said cork including a thin portion adapted to bepunctured by a needle, a second cork in the other end of said ampule,each of said corks sealingly engaging the ampule Wall, said second corkhaving an outwardly opening aperture therein adapted to receive apiercing member and having a diaphragm closing the inner end of saidaperture and puncturable by a piercing member passing through saidaperture, a third cork in said ampule sealingly engaging the ampuleWall, said third cork comprising a thin, tiltable disk and being spacedfrom the second cork to form a chamber, a medicinal preparation in saidchamber, each of said corks being cylindrical, and a solvent for themedicinal preparation in the ampule between the rst and third corks,said second cork being slidable in the ampule and means to preventinward movement of the rst cork in the ampule.

ARTHUR E. SMITH.

